Material world

Question 1

Particle theory

Answer 1

• all substances are made up of very small particles
• all substances consist of particles that can be similar or different
• there is space between the particles
• particles are constantly moving; speed depends on the temp. Of a substance
• particles either attract or repel. Strength of attraction or repulsion depends on the types of particles

Question 2

Why does the air pressure in a tire increase when the tire becomes war?

Answer 2

The particles in matter are in constant motion. As the temp rises the particles move more rapidly

Question 3

Solids

Answer 3

Particles held together by very strong bonds.
Particles can’t move around freely
Solids have a specific shape

Question 4

Liquids

Answer 4

Bonds are weaker than those of a solid
Can move around slowly
Take the shape of its container

Question 5

Gases

Answer 5

Bonds are weaker than those of a liquid
Move around much more freely
Large empty spaces between them

Question 6

Law of conservation of mass

Answer 6

Mass of the reactants must equal the mass of the products

Question 7

Sublimation

Answer 7

Solid to gas

Question 8

Deposition

Answer 8

Gas to solid

Question 9

Evaporation

Answer 9

Liquid to gas

Question 10

Condensation

Answer 10

Gas to liquid

Question 11

Malting

Answer 11

Solid to liquid

Question 12

Freezing

Answer 12

Liquid to soli d

Question 13

Density

Answer 13

Comparison between an objects mass and it’s volume

Question 14

How do u find density?

Answer 14

Mass divide by volume

Question 15

How do you find mass?

Answer 15

Density times volume

Question 16

How do you find volume?

Answer 16

Mass divided by density

Question 17

How do you find the volume of a liquid?

Answer 17

1- fill gc with the liquid

2- record amount

Question 18

How do you find the volume of a regular solid?

Answer 18

Length x width x height

Question 19

How do you find the volume of an irregular solid?

Answer 19

1- fill gc with water
2- drop object
3- Calculate difference

Question 20

How do you find the mass of liquid?

Answer 20

1- put empty gc on scale
2- press zero
3- fill gc
4- record mass

Question 21

Characteristic properties

Answer 21

Unique, more precise 
Ex: 
- boiling point 
- freezing point 
- melting point 
-conductivity 
- ph 
-density

Question 22

Non characteristic properties

Answer 22

• Color
• mass
• volume
• temperature
• smell

Question 23

Why is density a characteristic property?

Answer 23

It can be used to indentures a substance and it does not change.